Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/playground/common.go

@@ -0,0 +1,63 @@
+// Copyright 2013 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package playground registers HTTP handlers at "/compile" and "/share" that
+// proxy requests to the golang.org playground service.
+// This package may be used unaltered on App Engine.
+package playground // import "golang.org/x/tools/playground"
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+const baseURL = "https://golang.org"
+
+func init() {
+	http.HandleFunc("/compile", bounce)
+	http.HandleFunc("/share", bounce)
+}
+
+func bounce(w http.ResponseWriter, r *http.Request) {
+	b := new(bytes.Buffer)
+	if err := passThru(b, r); err != nil {
+		http.Error(w, "Server error.", http.StatusInternalServerError)
+		report(r, err)
+		return
+	}
+	io.Copy(w, b)
+}
+
+func passThru(w io.Writer, req *http.Request) error {
+	if req.URL.Path == "/share" && !allowShare(req) {
+		return errors.New("Forbidden")
+	}
+	defer req.Body.Close()
+	url := baseURL + req.URL.Path
+	r, err := client(req).Post(url, req.Header.Get("Content-type"), req.Body)
+	if err != nil {
+		return fmt.Errorf("making POST request: %v", err)
+	}
+	defer r.Body.Close()
+	if _, err := io.Copy(w, r.Body); err != nil {
+		return fmt.Errorf("copying response Body: %v", err)
+	}
+	return nil
+}
+
+var onAppengine = false // will be overriden by appengine.go and appenginevm.go
+
+func allowShare(r *http.Request) bool {
+	if !onAppengine {
+		return true
+	}
+	switch r.Header.Get("X-AppEngine-Country") {
+	case "", "ZZ", "CN":
+		return false
+	}
+	return true
+}